We use icons to convey an idea, an action or an object, in a split second. Icons work well on the web because they are ideal for non-verbal communication; they break the language barrier. This is why music players have rewind, fast-forward, and play icons; why airport customs always include an officer icon; and why three lines are known as a 'hamburger menu'.
When it comes to designing icons for the web, the treatment of line, shapes and space have everything to do with how the icons stand individually and as a group. Lines should be similar in thickness and ends (capped, beveled, and so on). Whenever possible, repeat similar shapes, angles and negative spaces. For example, if an icon set includes a 4px radius on all corners, carry that through to the rest of the icons – whether you're using Illustrator or Sketch, or sorting through The Noun Project.
Icons in code
SVGs and CSS animations make it so easy to include well-made icons (that aren't performance-draining icon font files) to any site. Consider how you could separate paths using SVGs to build dynamic, playful animations, or change colours in CSS on hover. The best part about SVGs is that there's no need to repeatedly export pixel-based image files for responsive sites, so it's possible to really stretch their capability and interactivity.
Here are three sites with great icons:
02. Grosse Laterne
This article originally appeared in net magazine issue 285, buy it here.